XmlNode.cpp

Go to the documentation of this file.

#include <atlbase.h>
#import <msxml3.dll> 

#define IXMLDOMNodePtr MSXML2::IXMLDOMNodePtr
#define IXMLDOMDocumentPtr MSXML2::IXMLDOMDocumentPtr
#define IXMLDOMNodeListPtr MSXML2::IXMLDOMNodeListPtr
#define IXMLDOMAttribute MSXML2::IXMLDOMAttribute

#include <assert.h>
#include "XmlNode.h"
#include "../common/standard.h"

#define NODE (*((IXMLDOMNodePtr*)node))
#define NODEDOC (*((IXMLDOMDocumentPtr*)node))
#define NODELIST (*((IXMLDOMNodeListPtr*)nodeListPtr))

#define PNODE ((IXMLDOMNodePtr*)node)
#define PNODEDOC ((IXMLDOMDocumentPtr*)node)
#define PNODELIST ((IXMLDOMNodeListPtr*)nodeListPtr)



XmlNode::XmlNode() 
{     
    CoInitialize (NULL);
    node = NULL; 
    bIsDoc = false;
};


XmlNode::XmlNode (void *ptr) 
{ 
    if (!ptr)
        throw ArgError("XmlNode::XmlNode(): bad ptr param.");
    
    node = ptr;
    bIsDoc = false;
}


XmlNode::~XmlNode()
{
    if (node)
    {
        if (bIsDoc)
            delete PNODEDOC;
        else
            delete PNODE;
    }
}


void XmlNode::loadFile (const char *filename)
{
    IXMLDOMDocumentPtr *doc = new IXMLDOMDocumentPtr;
    if (FAILED (doc->CreateInstance ("Msxml2.DOMDocument")))
    {
        throw Error("XmlDoc::loadFromFile(): unable to create msxml2 document.");
    }

    if (!(*doc)->load(bstr_t(filename)))
        throw RuntimeError("%s is not a valid XML file.", filename);

    node = doc;
    bIsDoc = true;
}

XmlNodeList XmlNode::getNodes (char *str)
{
    IXMLDOMNodeListPtr *nodes = new IXMLDOMNodeListPtr;
    *nodes = NODE->selectNodes(str);
    if (*nodes == NULL) 
        throw Error("XmlNode::getNodes(): unable to select %s nodes.", str);

    return XmlNodeList (nodes);
}

void XmlNode::getAttrib (int &rtn, char *str) const
{
    if (1 != sscanf (getAttrib(str).c_str(), "%d", &rtn))
        throw Error("Can't find a number in the following xml tag: %s", str);
}


void XmlNode::getAttrib (float &rtn, char *str) const
{
    if (1 != sscanf (getAttrib(str).c_str(), "%f", &rtn))
        throw Error("Can't find a number in the following xml tag: %s", str);
}

void XmlNode::getAttrib (double &rtn, char *str) const
{
    if (1 != sscanf (getAttrib(str).c_str(), "%lf", &rtn))
        throw Error("Can't find a number in the following xml tag: %s", str);
}

std::string XmlNode::getAttrib (char *str) const
{
    IXMLDOMNodePtr foundNode = NODE->selectSingleNode(bstr_t(str));  

    if (foundNode == NULL) 
        throw Error("XmlDoc::getAttribute(): unable to get string for node %s", str);

    CComQIPtr<IXMLDOMAttribute> attr = foundNode;
        if ( attr.p == NULL ) 
        throw Error("Unable to query for 'IXMLDOMAttribute' XML element interface, for %s", str);

    return std::string(attr->Gettext());
}


XmlNode XmlNodeList::getNode (int index)
{
    IXMLDOMNodePtr *rtn = new IXMLDOMNodePtr;
    *rtn = NODELIST->Getitem(index);

    if (NULL == *rtn)
        throw Error("XmlNodeList::getNode(): can't find node #%d", index);

    return XmlNode (rtn);
}

int XmlNodeList::getCount()
{
    return NODELIST->Getlength();
}


XmlNodeList::XmlNodeList () 
{ 
    CoInitialize (NULL);
    nodeListPtr = NULL; 
}


XmlNodeList::XmlNodeList (void *nl) 
{ 
    CoInitialize (NULL);
    if (nl == NULL) 
        ArgError( "XmlNodeList::XmlNodeList(): void pointer param unacceptable.");
    nodeListPtr = nl; 
}


XmlNodeList::~XmlNodeList()
{
    if (nodeListPtr)
        delete PNODELIST;
}

---